~/.xsession-erros spams `file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/MouseHandler.qml:84: TypeError: Cannot read property 'm' of null`

which is the first line of:

            if (!plasmoid.configuration.separateLaunchers && tasks.dragSource.m.IsLauncher === true
                 && above != null && above.m.IsLauncher !== true && above == ignoredItem) {
                return;
            } else {
                ignoredItem = null;
            }

I have seperate launchers unchecked in my config. If I check it, it works.

Reproducible: Always

Steps to Reproduce:
1. Uncheck "seperate launchers"

Actual Results:  
Does not reveal window + spam errors

Expected Results:  
reveal window